在变压器关键点见证中，引线装配时绝缘包扎要紧实，包厚符合（）要求。
A.图纸
B.现场
C.工艺
D.设计
参考答案：A
People in developed countries are supposed ____ more healthy food before than what they have today.
A．to be had
B．to have
C．had
D．to have had
不属于布鲁菌病传染源的是
A．羊类
B．牛类
C．猪类
D．人类
E．犬类
